(the pictures have a copyright by me - Patrick Joericke, ask me if you want a agreement)

Also read the TTSH Calibration guide or ask me for support.

Triangle , original from factory, wrong  - symmetry wrong

Solution:

Thats not a Sine wave !!- wrong settings from factory

Solution:

Purity - bends the TRI to a Sine wave - after this check the voltage to 10VPP (adjust the gain)

Filter Frequency, the Filter closed at 100hz instead of less 10hz

Solution:

Move 1 VCO to top in the VCF mixer and try to close the Filter, the signal must stop at 10-20hz Initial Frequency settings., not by 100hz or more, just turn the Trimmer as shown on bottom picture. (read the TTSH calibration guide too, to understand what you do)